How do I rotate to see my object from a different angle?
Welcome to Blender. In order to move around the platform full you can hold the middle mouse button down and move if you have a mouse or click and move the top right icon with the z, y, and x axis. The buttons on the number pad can bring you directly to different views such as front top and side views or you can use the ` key and it will give you options.
I highly recommend starting with blender gurus youtube course on making a donut from the beginning as he goes into detail on all of the essential you need to know. Hope this helped.